U.S. patent application number 10/923747 was filed with the patent office on 2005-09-22 for method, apparatus, programs and storage medium for transferring data between different types of terminals.
This patent application is currently assigned to Fujitsu Limited. Invention is credited to Fujino, Nobutsugu, Fukuta, Shigeki, Fukuyama, Noriyuki, Iida, Ichiro, Kato, Tetsuya, Motoyama, Hideyuki, Noda, Masahide, Toda, Akinobu.
Application Number | 20050210148 10/923747 |
Document ID | / |
Family ID | 34836589 |
Filed Date | 2005-09-22 |
United States Patent
Application |
20050210148 |
Kind Code |
A1 |
Kato, Tetsuya ; et
al. |
September 22, 2005 |
Method, apparatus, programs and storage medium for transferring
data between different types of terminals
Abstract
A communications terminal selection unit acquires, upon receipt
of a call origination request, presence information including
terminal information on terminals available to a call terminator
from a presence management unit, and selects a specific terminal,
if there are a plurality of terminals available to the call
terminator based on the presence information, based on terminal
selection information in which at least whether communication
quality or charge takes priority is defined beforehand by the call
terminator, notifying a call transfer unit of the selected terminal
as a transfer destination terminal for call transfer.
Inventors: |
Kato, Tetsuya; (Kawasaki,
JP) ; Toda, Akinobu; (Kawasaki, JP) ;
Motoyama, Hideyuki; (Kawasaki, JP) ; Fukuyama,
Noriyuki; (Kawasaki, JP) ; Noda, Masahide;
(Kawasaki, JP) ; Iida, Ichiro; (Kawasaki, JP)
; Fujino, Nobutsugu; (Kawasaki, JP) ; Fukuta,
Shigeki; (Kawasaki, JP) |
Correspondence
Address: |
STAAS & HALSEY LLP
SUITE 700
1201 NEW YORK AVENUE, N.W.
WASHINGTON
DC
20005
US
|
Assignee: |
Fujitsu Limited
Kawasaki
JP
|
Family ID: |
34836589 |
Appl. No.: |
10/923747 |
Filed: |
August 24, 2004 |
Current U.S.
Class: |
709/244 |
Current CPC
Class: |
H04M 3/54 20130101; H04M
15/43 20130101; H04M 15/8044 20130101; H04M 2215/42 20130101; H04M
2215/7414 20130101; H04L 65/1069 20130101; H04M 15/8016 20130101;
H04M 2215/745 20130101; H04L 67/303 20130101; H04M 2215/0168
20130101; H04M 3/42102 20130101; H04M 3/42365 20130101 |
Class at
Publication: |
709/244 |
International
Class: |
G06F 015/173 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 19, 2004 |
JP |
2004-079590 |
Claims
What is claimed is:
1. A method of transferring data between different types of
terminals, comprising: a presence information acquisition step of
acquiring presence information including terminal information on
terminals available to a call terminator upon receipt of a call
origination request; a terminal selection step of selecting a
specific terminal based on terminal selection information in which
the a call terminator at least defines in advance whether call
quality or call charge takes priority if there are a plurality of
terminals available to the call terminator based on the presence
information; and a call transfer step of notifying of a selected
terminal as transfer destination to allow call transfer.
2. The method of transferring data between different types of
terminals according to claim 1, wherein a terminal type is set such
as phone, instant message, http and mail as a first terminal
attribute in the terminal information, and wherein details of the
phone are set such as fixed phone, mobile phone, PHS, and VoIP
phone as a second terminal attribute in the terminal
information.
3. The method of transferring data between different types of
terminals according to claim 1, wherein the terminal selection step
includes selecting a specific terminal or service based on a
terminal filter defining a terminal selection condition that is
based on which is larger or smaller of a first evaluation value
held by a call originator and a second evaluation value held by a
call terminator.
4. The method of transferring data between different types of
terminals according to claim 3, wherein a terminal selection
condition is set in advance in the terminal filter for selecting a
specific terminal or service through comparison of call
originator's call priority level and call terminator's
busyness.
5. The method of transferring data between different types of
terminals according to claim 4, wherein a terminal selection
condition is set in advance in the terminal filter for selecting a
call terminal if busyness is lower than call originator's call
priority level and for selecting recorded service in any other
cases.
6. The method of transferring data between different types of
terminals according to claim 4, wherein a terminal selection
condition is set in advance in the terminal filter for selecting a
specific terminal or service through comparison of job titles of
the call originator and the call terminator.
7. The method of transferring data between different types of
terminals according to claim 6, wherein a terminal selection
condition is set in advance in the terminal filter for selecting a
call terminal if the call terminator is lower than the call
originator in job title and for selecting recorded service in any
other cases.
8. The method of transferring data between different types of
terminals according to claim 3, wherein the terminal selection step
includes selecting a terminal with high call quality or with low
communications charge based on priority level information if a
plurality of call terminals are selected as terminal candidates
based on the terminal filter.
9. The method of transferring data between different types of
terminals according to claim 8, wherein the terminal selection step
includes setting a weighted communication bandwidth, weighted
communications charge and priority level value as priority level
information, finding a priority level using (weighted communication
bandwidth)-(weighted communications charge)+(priority level value),
and selecting a call terminal with highest priority level in
absolute value so as to allow selection of a terminal with high
quality and low charge.
10. The method of transferring data between different types of
terminals according to claim 9, wherein the terminal selection step
includes, when selection of a terminal with high call quality is
desired, setting weights for communications charge in the priority
level information to zero, and selecting a call terminal with
highest priority level.
11. The method of transferring data between different types of
terminals according to claim 9, wherein the terminal selection step
includes, when selection of a terminal with low call charge is
desired, setting weights for communications bandwidth in the
priority level information to zero, and selecting a call terminal
with highest priority level in absolute value.
12. The method of transferring data between different types of
terminals according to claim 9, wherein when selection of a
specific terminal is desired independently of call quality and call
charge, a priority level value of a terminal to be selected in the
priority level information is set to a large value so as to assign
the highest priority level in absolute value, with other weights
being set to zero.
13. The method of transferring data between different types of
terminals according to claim 3, wherein the terminal selection step
includes setting a weighted communication bandwidth, weighted
communications delay, weighted time charging, weighted data
charging, and priority level value as the priority level
information, finding priority level using (weighted communication
bandwidth)-(weighted communications delay)-(weighted time
charging)-(weighted data charging)+(priority level value), and
selecting a call terminal with highest priority level in absolute
value so as to allow selection of a terminal with high quality and
low charge.
14. The method of transferring data between different types of
terminals according to claim 1, when a communications terminal in
an external network is selected as a transfer destination terminal
by Web page referencing from a call originator's terminal in an
external network, further comprising a dynamic phonebook display
step of notifying the call originator's terminal of the phone
number of the transfer destination terminal so as to allow the call
originator's terminal to directly originate a call.
15. The method of transferring data between different types of
terminals according to claim 14, wherein the dynamic phonebook
display step includes creating a confirmation screen that includes
the phone number of the transfer destination terminal as a link and
transferring the screen to the call originator's terminal.
16. The method of transferring data between different types of
terminals according to claim 1, when a communications terminal in
an internal network is selected as a transfer destination terminal
by Web page referencing from a call originator's terminal in an
external network, further comprising a dynamic phonebook display
step of notifying the call originator's terminal of a key phone
number so as to allow the call originator's terminal to make a call
origination request, and converting the key phone number received
through the call origination request to an internal network phone
number of the transfer destination terminal so as to allow call
transfer.
17. The method of transferring data between different types of
terminals according to claim 16, wherein the dynamic phonebook
display step includes creating a confirmation screen that includes
the key phone number as a link and transferring the screen to the
call originator's terminal.
18. An apparatus for transferring data between different types of
terminals, comprising: a presence information acquisition unit for
acquiring presence information including terminal information on
terminals available to a call terminator upon receipt of a call
origination request; a terminal selection unit for selecting a
specific terminal based on terminal selection information in which
the call terminator at least defines in advance whether call
quality or call charge takes priority if there are a plurality of
terminals available to the call terminator based on the presence
information; and a call transfer unit for notifying of a selected
terminal as transfer destination to allow call transfer.
19. A program for causing a computer to execute: a presence
information acquisition step of acquiring presence information
including terminal information on terminals available to a call
terminator upon receipt of a call origination request; a terminal
selection step of selecting a specific terminal based on terminal
selection information in which the call terminator at least defines
in advance whether call quality or call charge takes priority if
there are a plurality of terminals available to the call terminator
based on the presence information; and a call transfer step of
notifying of a selected terminal as transfer destination to allow
call transfer.
20. A computer-readable storage medium having therein stored a
program for causing a computer to execute: a presence information
acquisition step of acquiring presence information including
terminal information on terminals available to a call terminator
upon receipt of a call origination request; a terminal selection
step of selecting a specific terminal based on terminal selection
information in which the call terminator at least defines in
advance whether call quality or call charge takes priority if there
are a plurality of terminals available to the call terminator based
on the presence information; and a call transfer step of notifying
of a selected terminal as transfer destination to allow call
transfer.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates generally to a method,
apparatus, programs and storage medium for transferring data
between different types of terminals for transferring call such as
telephone, instant message, http and mail to an available terminal
based on presence information, and more particularly to a method,
apparatus, programs and storage medium for transferring data
between different types of terminals for dynamically selecting the
optimum terminal based on user's conditions and transferring call
when a plurality of terminals are selected such as fixed phone,
mobile phone and VoIP phone.
[0003] 2. Description of the Related Arts
[0004] Recent years have witnessed rapid diversification of work
style and communications infrastructure. For instance, office with
no personal desk and telecommuting are among forms of office
working style that are being practiced. Among communications
terminals are extension phone, mobile phone, notebook PC, PDA and
VoIP phone, with the nature of communications also diversified into
call, instant message, http and mail. In such an environment facing
diversified work styles and communications infrastructure, a single
user can use a plurality of different communications terminals, and
a service is being contemplated that would properly grasp in real
time communications terminals available to the user using a
presence system and, upon receipt of a request for call
origination, select a specific communications terminal based on
presence information and transfer the call. This call transfer
service is not limited to extension phone when a call origination
request is made from an external network to the user, and call may
be transferred by selecting the user terminal on the external
network based on presence information.
[0005] Means for managing presence information required for call
transfer service include personal management system for managing,
in a comprehensive and timely manner, a plurality of pieces of
personal behavioral information such as personal information as to
whether a person is at his desk, presence/absence information,
schedule information, conference attendance information,
discrimination for phone answering and building management based on
personal information (see Japanese Patent Application Laid-Open
Publication No. 1999-39570). On the other hand, to respond to
value-added service demands--including high quality requested by
end users only in specific voice communications such as business
discussion and support service (specific call) and only in voice
communications for reporting to police or fire department
(emergency call), a technology is known that relates to a VoIP
(Voice Over Internet Protocol) network system for transferring
(including transmitting and exchanging) voice packets over IP
(Internet Protocol) network and more particularly that relates to a
VoIP network system for providing a value-added service by
preferentially controlling calls associated with specific voice
session (see Japanese Patent Application Laid-Open Publication No.
2003-324472). Further, a technology is known that establishes call
to intranet and external network via DMZ (demilitarized zone) for
establishing call between terminals connected to intranet and
external network and implementing multimedia communications while
at the same time ensuring intranet security (see Japanese Patent
Application Laid-Open Publication No. 2003-324485). In such a call
transfer service using conventional user presence information,
however, while phone call can be transferred to where the receiver
is at present by combining the receiver's whereabout information
and the phone's transfer capability, this service does not
specifically take into assumption that there are a plurality of
terminals capable of receiving call. As a result of diversification
of communications infrastructure, if a plurality of phones are
available such as IP and ordinary phones where the receiver is now,
there are demands to transfer call to the less expensive IP phone
in the case of a call from the own company and to transfer call to
the ordinary phone that, although being more expensive, offers
better sound quality, rather than the IP phone with poor sound
quality in the case of a customer call. However, the current call
transfer service can only transfer call, even in the presence of a
plurality of communications terminals available at the same
location, to any one of the communications terminals that has been
set in a fixed manner, making it impossible to properly respond to
demands of users employing diversified communications terminals and
preventing full use of the diversified communications
infrastructure.
SUMMARY OF THE INVENTION
[0006] Thus, according to the present invention there are provided
a method, apparatus, programs and storage medium for transferring
data between different types of terminals for transferring call by
selecting a communications terminal matching with user demand. The
present invention provides a method of transferring data between
different types of terminals. The method of transferring data
between different types of terminals of the present invention
comprises:
[0007] a presence information acquisition step of acquiring
presence information including terminal information on terminals
available to a call terminator upon receipt of a call origination
request;
[0008] a terminal selection step of selecting a specific terminal
based on terminal selection information in which the a call
terminator at least defines in advance whether call quality or call
charge takes priority if there are a plurality of terminals
available to the call terminator based on the presence information;
and
[0009] a call transfer step of notifying of a selected terminal as
transfer destination to allow call transfer.
[0010] Herein, a terminal type is set such as phone, instant
message, http and mail as a first terminal attribute in the
terminal information, and details of the phone are set such as
fixed phone, mobile phone, PHS, and VoIP phone as a second terminal
attribute in the terminal information. The terminal selection step
includes selecting a specific terminal or service based on a
terminal filter defining a terminal selection condition that is
based on which is larger or smaller of a first evaluation value
held by a call originator and a second evaluation value held by a
call terminator. The terminal selection step includes selecting a
specific terminal or service based on which is larger or smaller of
call originator's call priority level and call terminator's
busyness. For example, a terminal selection condition is set in
advance in the terminal filter for selecting a specific terminal or
service through comparison of call originator's call priority level
and call terminator's busyness. A terminal selection condition is
set in advance in the terminal filter for selecting a call terminal
if busyness is lower than call originator's call priority level and
for selecting recorded service in any other cases. A terminal
selection condition is set in advance in the terminal filter for
selecting a specific terminal or service through comparison of job
titles of the call originator and the call terminator. For example,
a terminal selection condition is set in advance in the terminal
filter for selecting a call terminal if the call terminator is
lower than the call originator in job title and for selecting
recorded service in any other cases. The terminal selection step
includes selecting a terminal with high call quality or with low
communications charge based on priority level information if a
plurality of call terminals are selected as terminal candidates
based on the terminal filter. The terminal selection step includes
setting a weighted communication bandwidth, weighted communications
charge and priority level value as priority level information,
finding a priority level using (weighted communication
bandwidth)-(weighted communications charge)+(priority level value),
and selecting a call terminal with highest priority level in
absolute value so as to allow selection of a terminal with high
quality and low charge. In this case, when it is desired to use a
specific terminal if possible, a positive priority level value is
set, while otherwise a negative priority level value is set. The
terminal selection step includes, when selection of a terminal with
high call quality is desired, setting weights for communications
charge in the priority level information to zero, and selecting a
call terminal with highest priority level. The terminal selection
step includes, when selection of a terminal with low call charge is
desired, setting weights for communications bandwidth in the
priority level information to zero, and selecting a call terminal
with highest priority level in absolute value. When selection of a
specific terminal is desired independently of call quality and call
charge, a priority level value of a terminal to be selected in the
priority level information is set to a large value so as to assign
the highest priority level in absolute value, with other weights
being set to zero. The terminal selection step includes setting a
weighted communication bandwidth, weighted communications delay,
weighted time charging, weighted data charging, and priority level
value as the priority level information, finding priority level
using (weighted communication bandwidth)-(weighted communications
delay)-(weighted time charging)-(weighted data charging)+(priority
level value), and selecting a call terminal with highest priority
level in absolute value so as to allow selection of a terminal with
high quality and low charge.
[0011] In another aspect of the present invention, for the purpose
of avoiding double charging, there is provided a dynamic phonebook
display step of, when a communications terminal in an external
network is selected as a transfer destination terminal by Web page
referencing from a call originator's terminal in an external
network, notifying the call originator's terminal of the phone
number of the transfer destination terminal so as to allow the call
originator's terminal to directly originate a call. Herein, the
dynamic phonebook display step includes creating a confirmation
screen that includes the phone number of the transfer destination
terminal as a link and transferring the screen to the call
originator's terminal. In a further aspect of the present
invention, for the purpose of saving external numbers, there is
provided a dynamic phonebook display step of, when a communications
terminal in an internal network is selected as a transfer
destination terminal by Web page referencing from a call
originator's terminal in an external network, notifying the call
originator's terminal of a key phone number so as to allow the call
originator's terminal to make a call origination request, and
converting the key phone number received through the call
origination request to an internal network phone number of the
transfer destination terminal so as to allow call transfer. Herein,
the dynamic phonebook display step includes creating a confirmation
screen that includes the key phone number as a link and
transferring the screen to the call originator's terminal.
[0012] The present invention provides an apparatus for transferring
data between different types of terminals. The apparatus for
transferring data between different types of terminals of the
present invention comprises a presence information acquisition unit
for acquiring presence information including terminal information
on terminals available to a call terminator upon receipt of a call
origination request; a terminal selection unit for selecting a
specific terminal based on terminal selection information in which
the call terminator at least defines in advance whether call
quality or call charge takes priority if there are a plurality of
terminals available to the call terminator based on the presence
information; and a call transfer unit for notifying of a selected
terminal as transfer destination to allow call transfer. The
present invention provides a program for call transfer executed by
a computer. The program of the present invention causes a computer
making up a call transfer server to execute:
[0013] a presence information acquisition step of acquiring
presence information including terminal information on terminals
available to a call terminator upon receipt of a call origination
request;
[0014] a terminal selection step of selecting a specific terminal
based on terminal selection information in which the call
terminator at least defines in advance whether call quality or call
charge takes priority if there are a plurality of terminals
available to the call terminator based on the presence information;
and
[0015] a call transfer step of notifying of a selected terminal as
transfer destination to allow call transfer.
[0016] The present invention provides a computer-readable storage
medium having therein stored a program for call transfer. The
storage medium of the present invention stores therein a program
which causes a computer to execute:
[0017] a presence information acquisition step of acquiring
presence information including terminal information on terminals
available to a call terminator upon receipt of a call origination
request;
[0018] a terminal selection step of selecting a specific terminal
based on terminal selection information in which the call
terminator at least defines in advance whether call quality or call
charge takes priority if there are a plurality of terminals
available to the call terminator based on the presence information;
and
[0019] a call transfer step of notifying of a selected terminal as
transfer destination to allow call transfer.
[0020] It is to be noted that the details of the apparatus,
programs and storage medium of the present invention for
transferring data between different types of terminals are
basically identical to those of the method of the present invention
for transferring data between different types of terminals.
According to the present invention, user definition of
communications terminal selection conditions--conditions with
regards to communications terminals available for use such as
whether call quality or call charge takes priority--allows, if a
plurality of communications terminals are available for use at the
same time in response to a call origination request, the optimal
communications terminal to be chosen from call originator/receiver
user presence information, busyness and mutual relationship such as
job title, and further from selection information such as whether
communication quality or charge takes priority, automatically
selecting the optimal communications terminal and transferring call
without the call originator being aware of the call terminator,
providing the optimal transfer service in a situation of a
plurality of different types of terminals being available for use
and taking full advantage of merits of diversification of
communications infrastructure. It is also possible, if, in response
to a call transfer request from an external network, a terminal
existing in the same external network is selected as a call
termination terminal, to notify the phone number of the selected
terminal so as to allow direct call origination because of the fact
that call transfer results in call charge being charged doubly,
thus avoiding double charging and allowing reduction in
communications charge. It is also possible to determine a key phone
number for individual phone numbers of a plurality of terminals
existing in the inhouse network and notify the key number to call
transfer request, routed via a data circuit of an external network,
so as to allow call origination, transferring call by converting
the key phone number received as a result of call origination to
the terminal phone number selected by call transfer request and
thereby saving outside call numbers. The above and other objects,
features, and advantages of the present invention will become more
apparent from the following detailed description with reference to
the drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
[0021] FIG. 1 is a block diagram of a communications system to
which call transfer processing of the present invention is
applicable;
[0022] FIGS. 2A to 2C are block diagrams of the functional
configurations of a call transfer server, a secure gateway, and
user clients in FIG. 1;
[0023] FIG. 3 is an explanatory view of user presence information
used in the present invention;
[0024] FIG. 4 is an explanatory view of terminal information used
in the present invention;
[0025] FIG. 5 is an explanatory view of call origination event
information used in the present invention;
[0026] FIG. 6 is an explanatory view of in-room terminal
information used in the present invention;
[0027] FIG. 7 is an explanatory view of a terminal filter list used
in the present invention;
[0028] FIG. 8 is an explanatory view of a priority level
information list used in the present invention;
[0029] FIG. 9 is an explanatory view of a terminal selection rule
list used in the present invention;
[0030] FIG. 10 is an explanatory view of a call terminal selection
sequence of the present invention by the call transfer server;
[0031] FIGS. 11A and 11B are flowcharts of a call terminal
selection processing of the present invention by the call transfer
server;
[0032] FIG. 12 is an explanatory view of a terminal information
registration sequence by the call transfer server;
[0033] FIGS. 13A and 13B are flowcharts of a terminal information
registration processing by the call transfer server;
[0034] FIGS. 14A and 14B are explanatory views of a terminal
information registration sequence in user clients;
[0035] FIG. 15 is an explanatory view of a communications system of
the present invention for avoiding double charging by referencing a
mobile phone Web page;
[0036] FIG. 16 is an explanatory view of double charging when call
transfer of the present invention is not applied;
[0037] FIG. 17 is an example of a browsing page screen returned
from an http server in response to a phonebook page browsing
request in FIG. 15;
[0038] FIG. 18 is an explanatory view of a confirmation screen
notified to a call originator's terminal from a communications
terminal selection unit;
[0039] FIGS. 19A to 19C are block diagrams of the functional
configurations of the call transfer server, secure gateway, and
user clients in FIG. 15;
[0040] FIG. 20 is an explanatory view of a call terminal selection
sequence of the present invention for avoiding double charging in
FIG. 15;
[0041] FIG. 21 is an explanatory view of a communications system of
the present invention for saving outside call numbers;
[0042] FIG. 22 is an explanatory view of usage status of outside
call numbers when the present invention is not applied;
[0043] FIGS. 23A to 23C are block diagrams of the functional
configurations of the call transfer server, secure gateway, and
user clients in FIG. 21;
[0044] FIG. 24 is an explanatory view of a communications terminal
selection sequence of the present invention for saving outside call
numbers shown in FIGS. 23A to 23C; and
[0045] FIGS. 25A and 25B are flowcharts of a call terminal
selection processing of the present invention including double
charging avoidance in FIG. 15 and outside call number saving in
FIG. 21.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0046] FIG. 1 is a block diagram of a communications system to
which call transfer processing of the present invention is applied.
In FIG. 1, there is provided a call transfer server 10 for
performing call transfer processing of the present invention in an
internal network 12 such as corporate network. An inhouse user
client 14, extension phones 16-1 and 16-2 and position information
detection devices 18-1 and 18-2 are connected to the call transfer
server 10. The call transfer server 10 is connected to an external
network 22 via a DMZ (demilitarized zone) 20. In the external
network 22, there exists an outside user client 32 that is
connected to a VPN server via VPN (Virtual Private Network) as a
communications path. A secure gateway server 26 provided in the DMZ
20 and a secure gateway relay server 24 provided in the internal
network 12 perform connection control for instant message, presence
information and IP phone. In the case of connection from the VoIP
phone of the outside client 32 to the VoIP phone of the internal
network 12, for instance, connection is established with the secure
gateway server 26 located at an Internet relay point, for example,
for conversion to MetaIP phone protocol, thus transmitting data
through safe connection with the secure gateway relay server 24,
the next relay point across the firewall. Data thus sent is
reconstructed as VoIP phone protocol at the secure gateway relay
server 24, the relay point of the internal network 12, originating
call to VoIP phone provided, for example, by the inhouse user
client 14 of the internal network 12 and implementing safe VoIP
communication via firewall. The call transfer server 10 is
connected to a mobile phone network 34, enabling call connection
with a mobile phone 36. Relay point between the mobile phone
network 34 and the internal network 12 is implemented by a SIP-PSTN
gateway server 35. The call transfer server 10 provided in the
internal network 12 has capabilities, namely, a call transfer unit
38, a communications terminal selection unit 40, a presence
management unit 42 and a position information management unit 44.
The communications terminal selection unit 40 provided in the
internal network 12 acquires presence information--including call
originator's presence information and terminal information about
terminals available for use by call terminator--from the presence
management unit 42 upon receipt of a call origination request, for
example, from the extension phone 16-1, and selects a terminal
available for use by call terminator based on the acquired presence
information, notifying the call transfer unit 38 of the terminal so
that the unit 38 can proceed with call transfer. In this case, if
there are a plurality of terminals available for use by call
terminator, the communications terminal selection unit 40 selects,
based on terminal selection information, in which at least whether
communication quality or charge takes priority is defined
beforehand by call terminator, a specific terminal from among a
plurality of terminal candidates, notifying the call transfer unit
38 of the terminal so that the unit 38 can proceed with call
transfer. As for terminal selection information for selection of a
specific terminal among a plurality of terminals, terminal filters
and priority level information are selectively defined by user to
be made available for use in the present invention as will be
apparent from later description.
[0047] FIGS. 2A and 2B are block diagrams showing the functional
configurations of the call transfer server 10, a secure gateway 30,
the inhouse user client 14 and the outside client 32 in FIG. 1. In
FIGS. 2A to 2C, the call transfer unit 38 of the call transfer
server 10 is provided with a call origination reception unit 46 and
a call transfer unit 48. The call origination reception unit 46
creates a call origination event in response to a call origination
request from a call origination terminal such as the extension
phone 16, notifying the call transfer server 10. In response to
selection notice from the communications terminal selection unit
40, the call transfer unit 48 transmits call to the destination of
call termination--a communications terminal selected from call
origination terminal and the extension phone 16. The communications
terminal selection unit 40 is provided with a call origination
event reception unit 50, a presence acquisition unit 52, a terminal
filter unit 54, a terminal priority level calculation unit 56, a
top priority terminal selection unit 58 and a call transfer event
transmission unit 60. The details of processings performed by the
individual units of the communications terminal selection unit 40
will become apparent in later description. The presence management
unit 42 is provided with a presence database management unit 62 and
a user presence database 64. In the user presence database 64,
given information is registered in advance in relation to users
using the communications system in FIGS. 2A to 2C. The presence
management unit 42 is further provided with an authentication unit
68, a right management unit 66, a presence change notification unit
70 and a change notification request registration unit 72. The
position information management unit 44 is provided with a fixed
terminal information management unit 74, a room coordinate
information management unit 76, a tag ID management unit 78, a
position information reception unit 80, a sensor position
management unit 82 and a terminal information notification unit 84.
In correspondence with the position information management unit 44,
the position information detection device 18 is provided, for
example, within each of the rooms in the internal network,
activating an ID notification unit 85 as a result of information
communication from a tag ID 15 for the position information
detection device 18 if a user with the tag ID 15 enters the
communication-enabled area of the position information detection
device 18 and conveying information in the detected tag ID 15 to
the position information reception unit 80 of the position
information management unit 44.
[0048] FIG. 3 is an explanatory view of user presence information
108 registered in the user presence database 64 in FIGS. 2A to 2C.
The user presence information 108 contains not only a name 110, a
department 112, a work group 114, a related project name 116, a
related product name 118, busyness 120, a job title 122, position
information 124, a wireless tag ID 126, communications terminal
information 128, but also additional profile information such as
sex, address, birth date and hobby information. In the
communications terminal selection processing of the present
invention, conditions for selecting the optimum terminal from among
a plurality of terminals available for use by call terminator, and
more specifically, terminal filters are defined using the related
project name 116, the busyness 120, the job title 122 and so on in
the user presence information 108.
[0049] FIG. 4 is an explanatory view of terminal information 130
managed by the position information management unit 44 provided in
the call transfer server 10. The terminal information 130 is
created for each terminal ID. In the terminal information 130, a
contact media 132, a status 134, a UID (unit ID) 136, a media
profile 138, a phone type 140, a charge 142, a bandwidth 144 and a
delay 146 are registered as information. The contact media 132, a
tag representing the user contact terminal, indicates one of fixed
phone, instant message (im), http and mail as attribute information
(first attribute information). The status 134 indicates whether the
terminal represented by the contact media 132 is available. The UID
136 is the address of the contact media, with SIP (Session
Initiation Protocol) address used for all phone types. Further,
detailed types of contact terminal are defined as attribute
information (second attribute information). For phone, for example,
fixed phone ("fixed"), mobile phone ("pdc"), PHS ("phs") and VoIP
software ("voip") are stipulated. The media profile 138 is detailed
information on the contact terminal. The phone type 140 indicates
whether the phone terminal is interactive or recording. The charge
142, representing the usage cost of the contact terminal, indicates
charging type as attribute information and stipulates time charging
(.Yen./min) and data charging (.Yen./1 Kbyte). The bandwidth 144, a
parameter representing call quality, accepts communication
bandwidth information (bps) of the contact terminal as input.
Further, the delay 146 is also a parameter representing call
quality and accepts communication delay information (sec) of the
contact terminal as input. In the communications terminal selection
processing of the present invention, since a specific terminal is
selected from among a plurality of terminal candidates according to
whether user gives priority to call quality or charge, values of
the charge 142, the bandwidth 144 and the delay 146 are used to
calculate priority level for this selection.
[0050] FIG. 5 is an explanatory view of call origination event
information 148 created at the time of reception of a call
origination request by the call origination reception unit 46 of
the call transfer server 10, and notified to the communications
terminal selection unit 40. In the call origination event
information 148 in FIG. 5, there are registered a transfer event ID
150, a call originator terminal ID 152, a transfer monitoring
registration ID 154, a current transfer destination number 156, a
call origination number 158, a call termination number 160, and
further a call priority level 162. Among these, the call priority
level 162 is employed as evaluation value for call originator of
terminal filters used for the communications terminal selection
processing.
[0051] FIG. 6 is an explanatory view of in-room terminal
information 164 managed by the position information management unit
44 of the call transfer server 10. The in-room terminal information
164 consists of a room item 166, a location area 168 and a contact
170. The room item 166, terminal information in a single room,
holds a room name as attribute information. The location area 168,
room area information, represents the room location and range and
indicates the room shape as attribute information. The contact 170,
including contact media format terminal information, represents a
user-specific terminal if attribute information "paid" is added and
a common terminal if not.
[0052] FIG. 7 is an explanatory view of a terminal filter list 172
managed by the terminal filter unit 54 of the communications
terminal selection unit 40 provided in the call transfer server 10
in FIGS. 2A to 2C. The terminal filter list 172 stores, for
example, three types of terminal filters having different filter
contents named FL1, FL2 and FL3 as filter IDs. These terminal
filters define rules for comparing, upon receipt of a call
origination request, a first evaluation value held by call
originator and a second evaluation value held by call terminator
and selecting a specific terminal or service based on which is
larger or smaller of the two values. The terminals FL1 to FL3 are
described more specifically as follows. The terminal filter FL1
selects call terminal if call terminator's busyness is lower than
call priority level and selects recorded service in any other
cases. The terminal filter FL2 selects call terminal if call
terminator's job title is lower than that of call originator and
selects recorded service in any other cases. Further, as for the
terminal filter FL3, although it selects call terminal if call
terminator's busyness is lower than call priority level and selects
recorded service in any other cases, the terminal filter FL3
selects call terminal, as an exception, if a specific project name
is contained in the call originator's related project name.
Appropriate terminal filters may be defined as necessary in
addition to the terminal filters FL1, FL2 and FL3 shown in the
terminal filter list of FIG. 7, and users select and set up an
appropriate terminal filter for each terminal according to the
types of communications terminals available to them.
[0053] FIG. 8 is an explanatory view of a priority level
information list 174 managed by the terminal priority level
calculation unit 56 of the communications terminal selection unit
40 provided in the call transfer server 10. The priority level
information list 174 consists of list IDs, user-requested
conditions and evaluation functions each made up of weight and
value. Priority level information in the priority level information
list 174 is used to calculate priority level for each of the
terminal candidates, for example, if call terminal is selected
using any one of the terminal filters in the terminal filter list
172 shown in FIG. 7 and if there exist a plurality of candidates
for call terminal, and specified priority level information in the
priority level information list 174 is employed for priority level
calculation. A calculation formula for calculating a priority level
P for terminals of the present invention is given, for example, by
the following formula: Priority level P={log
(bandwidth).times.W1}-{(delay).times.W2}-{time charging
(.Yen./min).times.W3}-[data charging (.Yen./1 Kbyte).times.W4]+V
(1) In formula (1), values for bandwidth, delay, time charging and
data charging can be obtained from the terminal information 130 in
FIG. 4. Each of these values obtained from the terminal information
130 is weighted by multiplication by weights W1, W2, W3 and W4.
Further, a priority level value V at the end is set to an arbitrary
value by users as necessary to adjust the priority level P. That
is, a positive priority level value is set when a user wishes to
use a specific terminal to the extent possible, whereas a negative
priority level value is set if the user does not wish to use any
specific terminal. It is apparent from the calculation formula of
the priority level P that "bandwidth", the first term on the right
side, is a parameter for giving priority to call quality. As a
result, the larger the priority level P, the higher the call
quality and the less expensive the communications charge.
Conversely, the lower the priority P, the poorer the call quality
and the more expensive the communications charge. Priority level
information PD1 in the priority level information list 174 of FIG.
8 has a user-requested condition stating, "Priority given to
terminal with high call quality and inexpensive call charge." In
this case, the weights W1, W2, W3 and W4, and the priority level
value are set respectively to 10, 0, 5, 10 and 10. According to
such a setting of an evaluation function, it is possible to
preferentially select a terminal with higher call quality and less
expensive communications charge as the priority level increases
using the formula (1). Priority level information PD2 has a
user-requested condition stating, "Priority given to call quality
if call terminator is lower than call originator in job title."
Since call quality takes priority, the weight W1 for "bandwidth"
and the weight W2 for "delay", both related to call quality, are
set respectively to W1=10 and W2=100 in the evaluation function.
Since call charge is not taken into account, both W3 and W4 are set
to 0, further with the priority level value V set to 0. According
to the evaluation function using the priority level information
PD2, the higher the priority level, the more priority is given to
call quality. Priority level information PD3 has a user-requested
condition stating, "Priority given to call charge if call
terminator is equal to or higher than call originator in job
title." Since call charge takes priority, the weight W1 for
"bandwidth" and the weight W2 for "delay", both related to call
quality, and the priority level value are set respectively to 0,
whereas the weights W3 and W4 for time charging and data charging,
evaluation values for giving priority to call charge, are set
respectively to 10. It is to be noted that since the priority level
value P calculated for the priority level information PD3 is
negative, the terminal with the highest priority level is selected
based on the absolute value of the priority level value P. Priority
level information PD4 has a user-requested condition stating, "Use
of VoIP phone desired." In this case, the weights W1 to W3 for call
quality and time charging are all set to 0, whereas the weight W4
for data charging is set to -10 and the priority level value V for
calculating the priority level P for VoIP phone is set to 100, a
large value that ensures that VoIP phone is ranked above all other
terminals in calculation results. Priority level information PD5
also has a user-requested condition stating, "Use of TV-equipped
phone desired." In this case, the weights W1 to W4 for call quality
and call charge are all set to 0, whereas the priority level value
V for calculating the priority level for TV-equipped phone is set
to 100, a large value.
[0054] FIG. 9 is an explanatory view of a terminal selection rule
list 176 used in communications terminal selection processing
performed by the terminal filter unit 54, the terminal priority
level calculation unit 56 and the top priority terminal selection
unit 58 of the communications terminal selection unit 40 provided
in the call transfer server 10 of FIGS. 2A to 2C. The terminal
selection rule list 176 consists of rule IDs 178, rule descriptions
180, terminal filters 182 and priority level information 184,
defining combinations of the terminal filter 182 and the priority
level information 184 that satisfy the rule descriptions 180. It Ls
possible, based on the terminal filter 182 and the priority level
information thus defined, to select, from among a plurality of
terminal candidates, a specific terminal that satisfies the rule
description. Here, a description will be given below of rules R1 to
R5 in the terminal selection rule list 176 of FIG. 9.
[0055] (Rule R1)
[0056] Selection according to busyness. Call terminal is selected
by the terminal filter FL1 if call terminator "busyness" is lower
than "call priority level" in call origination event information,
with recorded service selected in any other cases. The priority
level information PD1 gives priority to candidate with high call
quality and low call charge.
[0057] (Rule R2)
[0058] Selection according to job title. Call terminal is selected
by the terminal filter FL1 if call terminator "busyness" is lower
than "call priority level" in call origination event, and call
terminal is equally selected by the terminal filter F2 if call
terminator is lower than call originator in job title, with
recorded service selected in any other cases. When call terminal is
selected, call quality takes priority if call terminator is lower
than call originator in job title because of the priority level
information PD2, with priority given to candidate with inexpensive
call charge in any other cases because of the priority level
information PD3.
[0059] (Rule R3)
[0060] Selection according to project. Call terminal is selected by
the terminal filter FL3 if call terminator "busyness" is lower than
"call priority level" in call origination event, with recorded
service selected in any other cases. As an exception, call terminal
is selected if a specific project name is contained in the call
originator's "related project name" information. If there are a
plurality of call terminals, priority is given to call quality
because of the priority level information PD2. The rule R3 denotes
a case in which the user wishes to receive calls related to
important projects even if the user is in the middle of a
meeting.
[0061] (Rule 4)
[0062] Selection according to individual name/user ID. Call
terminal is selected by the terminal filter FL1 if call terminator
"busyness" is lower than "call priority level" in call origination
event information, with recorded service selected in any other
cases. If there are a plurality of communications terminals,
priority is given to terminal with inexpensive call charge by the
priority level information PD4. Additionally, a priority level
value V2 for VoIP phone is set to 100 if call originator has a
specific user ID. The rule R4 denotes a case in which call is
terminated as a call soliciting multi-party phone conference from a
phone conferencing system and a case in which the user wishes to
receive a call with VoIP phone of the own personal computer to the
extent possible in order to share data.
[0063] (Rule 5)
[0064] Selection according to call capability of call originator.
The priority level value V is set to 100, thus allowing priority
level information PD5 to assign a high priority level to the
terminal with TV phone capability among call terminals of call
terminator if call originator uses a phone equipped with TV phone
capability and if a plurality of call terminals are selected by the
terminal filter FL1.
[0065] Thus, in the communications terminal selection processing of
the present invention, it is possible to obtain communications
terminal selection results tailored to user needs if one or more
terminal filters and one or more pieces of priority level
information are combined through user setting of a terminal
selection rule. In this case, if a plurality of terminal filters
are set by a single user, the sum of sets of terminals made
available by individual terminal filters is available terminal
candidates. If a plurality of pieces of priority level information
is set by a single user, the total of evaluation values of all
pieces of priority level information is the priority level of
individual terminals. Further, if results of the automatic
selection according to the present invention are not satisfactory,
call originator can add new rules or change parameters serving as
weights and value upward or downward, thus making it possible to
obtain terminal selection results that suit the preference of call
terminator. As terminal selection rules, a template is available in
advance, thus allowing addition of favorite terminal selection
rules by addition through parameter settings. In addition to the
above, specific user's terminal selection rule may be copied for
use by giving an instruction, such as "Copy Mr. A's filter and
priority level." Further, if a terminal selection rule is changed,
it is possible to perform simulation using call selection
capability and confirm, for example, "Priority setting in the case
of customer call while on business trip" obtained as simulation
results, thus adjusting terminal filters and/or priority level
information in the terminal selection rule list.
[0066] FIG. 10 is an explanatory view of a call terminal selection
sequence of the present invention by the call transfer server in
FIGS. 2A to 2C. In FIG. 10, if a call is originated from a call
originator terminal 11, the call transfer unit 38 handles a call
origination acceptance 186 and issues a call origination event 188,
created based thereon, to the communications terminal selection
unit 40. The communications terminal selection unit 40 makes an
information inquiry 190 to the presence management unit 42,
acquiring a terminal information list 192--a list combining call
originator and terminator presence information and call origination
event information--from the presence management unit 42. Based on
the terminal information list 192, the communications terminal
selection unit 40 selects available call terminal or terminals
using user-specified rules in the terminal selection rule list 176
of FIG. 9, calculates a priority level for each call terminal if
there are a plurality of available call terminals, selects a
terminal with the highest calculated priority level as the transfer
destination terminal and notifies the terminal to the call transfer
unit 38 as a call transfer event 194. In response to the call
transfer event 194 from the communications terminal selection unit
40, the call transfer unit 38 performs a transfer 196 for notifying
the transfer destination terminal to the call originator terminal
11, thus resulting in a call termination 198 on the extension phone
16--the transfer destination terminal selected by the call
originator terminal 11.
[0067] FIGS. 11A and 11B are flowcharts of a call terminal
selection processing of the present invention by the call transfer
server 10. In FIG. 11A and FIG. 11B, the call transfer unit 38
generates, upon reception of a call origination request, a call
origination event and transmits the request to the communications
terminal selection unit 40 at Step S1. Upon reception of the call
origination event, the communications terminal selection unit 40
makes a presence information inquiry to the presence management
unit 42 at Step S2.
[0068] In response to the inquiry, the presence management unit 42
returns presence information as response at Step S3. This allows
the communications terminal selection unit 40 to receive and obtain
presence information at Step S4. Next at Step S5, the
communications terminal selection unit 40 extracts each of the
terminal information list, terminal filter list and priority level
information list using the call originator's user ID, and selects a
filter from the terminal filter list at Step S6. Then, the
communications terminal selection unit 40 registers a terminal
matching with the selected filter at Step S7. At Step S8, the
communications terminal selection unit 40 verifies whether there
are any remaining filters in the terminal filter list, and, if so,
returns to Step S6 to repeat similar processings. When there are no
more remaining filters in the terminal filter list at Step S8, the
communications terminal selection unit 40 proceeds to Step S9 where
the unit extracts one candidate from the terminal candidate list,
extracts priority level information from the priority level
information list at Step S10, and calculates a priority level for
addition based on the weights and value in the priority level
information at Step S11. Further at Step S12, the communications
terminal selection unit 40 verifies whether there is next priority
level information in the priority level information list, and, if
so, returns to Step S10 to repeat similar processings. When there
is no more priority level information in the priority level
information list, the communications terminal selection unit 40
proceeds to Step S13 where the unit verifies whether there are any
terminal candidates in the terminal candidate list, and, if so,
returns to Step S9 again where the unit extracts a next terminal
candidate and similarly calculates a priority level. When there are
no more terminal candidates at Step S13, the communications
terminal selection unit 40 proceeds to Step S14 where the unit
sorts terminal candidates according to priority level, and then at
Step S15, the unit creates a call transfer event to the address of
the top priority terminal and delivers the event to the call
transfer unit 38. The call transfer unit 38 receives the event and
handles call termination on the selected communications terminal at
Step S16. It is to be noted that if priority is given to call
charge, the calculated values for priority level are all negative
in the sorting of terminal candidates according to priority level
at Step S14. Therefore, terminal candidates are sorted according to
priority level in absolute value, thus selecting the terminal with
the highest priority level.
[0069] FIG. 12 is an explanatory view of a terminal information
registration sequence in the call transfer server 10 of FIGS. 2A to
2C. In FIG. 12, an ID reception 198 takes place if the user-owned
ID tag 15 enters the communication-enabled area of the position
information detection device 18, causing the device 18 to perform a
tag ID/sensor ID registration 200 in the position information
management unit 44. The position information management unit 44
acquires a corresponding user from the tag ID 15 and corresponding
position from the sensor ID, searching for user coordinates having
the tag ID. In this case, if the same ID tag 15 is detected by the
plurality of position information detection devices 18, the
position information management unit 44 calculates the center of
gravity point of the plurality of position information detection
devices 18 that have detected the tag, thus using the point as the
coordinates corresponding with the user. The position information
management unit 44 acquires the room where the ID tag 15 currently
exists from room information registered using calculated coordinate
information. Then, the position information management unit 44
performs a user ID/position information registration 202 in the
presence management unit 42. In response to the registration, the
presence management unit 42 adds position information to the
presence information of the user ID. In the presence of terminal or
common terminal information for the user ID added to the detected
room, the presence management unit 42 also adds such terminal
information.
[0070] FIGS. 13A and 13B are flowcharts of a terminal information
registration processing in the call transfer server 10 of FIGS. 2A
to 2C. In FIG. 13A and FIG. 13B, when the position information
detection device 18 detects the wireless tag at Step S101, the
device 18 transmits the tag ID and sensor ID to the position
information management unit 44 at Step S102. In response to the
transmission, the position information management unit 44 receives
the tag ID and sensor ID information at Step S1 and converts the
tag ID to a user ID at Step S2. Then, at Step S3, the position
information management unit 44 converts the sensor ID to coordinate
information. The position information management unit 44 verifies
at Step S4 whether coordinate information is registered as room
Information, and, if so, converts the coordinates to room
information at Step S5, and then creates presence notification
information representing room information at Step S6. Next at Step
S7, the position information management unit 44 verifies whether
there are any call terminals corresponding with the room
information and the user ID, and, if so, adds call terminal
information to the presence notification information at Step S8. If
there are no call terminals, the position information management
unit 44 skips Step S8. Next at Step S9, the position information
management unit 44 transmits the presence notification information
to the presence management unit 42. In response to the
transmission, the presence management unit 42 registers the
received presence information in the user presence database.
[0071] FIGS. 14A and 14B are explanatory views of a terminal
information registration sequence by the user clients 32 of FIGS.
2A to 2C in the call transfer server 10. In FIGS. 14A and 14B, if
the user client 32 enters the communication-enabled area of a
Wireless LAN 204, an access point discovery 208 is notified to an
OS 206, resulting in the OS 206 establishing a wireless LAN
connection 210 with the wireless LAN access point. At the
completion of the wireless LAN connection 210, the OS 206 makes a
LAN connection completion notification 212 to the device monitoring
unit 102. The device monitoring unit 102 notifies a VPN connection
start 214 to a VPN client 104, automatically initiating encryption
notification by VPN to the network. When the network, encrypted by
the VPN client 104, is built, a VPN connection completion 216 is
notified to the device monitoring unit 102. The device monitoring
unit 102 notifies the user ID and LAN information to a presence
notification unit (presence management client) 100 as an
information registration 218. The presence notification unit 100
notifies the user ID and LAN information to the presence management
unit 42 of the call transfer server 10 as an information
registration 220 and at the same time makes an IP address
notification 222 to a VoIP client 106. The VoIP client 106
registers an SIP address, IP address and port in the call transfer
unit 38 of the call transfer server 10 as a registration 224, thus
acquiring the SIP address as a VoIP phone number. The VoIP client
106 creates call terminal information by adding communications
quality and host information from the LAN information to the VoIP
phone number as the SIP address and registers the call terminal
information in the presence notification unit 100 as an information
registration 226. The presence notification unit 100 notifies the
same call terminal information as that registered in the presence
management unit 42 of the call transfer server 10, thus registering
the information.
[0072] FIG. 15 is an explanatory view of a communications system of
the present invention for avoiding double charging by referencing a
mobile phone Web page. In FIG. 15, the internal network 12 such as
corporate network is provided with the call transfer server 10 that
in turn is provided with the call transfer unit 38, the
communications terminal selection unit 40, the presence management
unit 42 and the position information management unit 44. These
capabilities are basically the same as those in the embodiment
described in FIGS. 2A to 2C. In addition, the present embodiment is
provided with a dynamic phonebook display unit 230. The dynamic
phonebook display unit 230 handles processings for avoiding double
charging, for example, if the communications terminal selection
unit 40 selects, in response to a call origination request from a
mobile phone 36-1 in the mobile phone network 34, a mobile phone
36-2, that is also an external mobile phone, as the call
originator's communications terminal.
[0073] FIG. 16 is an explanatory view of double charging taking
place when a call transfer server 10-1, not equipped with the
capability of the dynamic phonebook display unit 230, transfers a
call by selecting the mobile phone 36-2 as the communications
terminal in response to a call origination request from the mobile
phone 36-1. When a call origination request from the mobile phone
36-1 is received by the call transfer server 10-1 via the SIP-PSTN
gateway server 35, a relay point of the mobile phone network 34,
charging occurs at this communications path 300. Then, when call
termination occurs as the call transfer server 10-2 selects the
mobile phone 36-2 as the call terminator, and a communications path
302 is established from the internal network 12 to the mobile phone
network 34, another charging occurs for the communications path
302. Thus, double charging occurs if the call transfer server 10
selects, in response to a call origination request from an external
network such as the mobile phone network 34, a communications
terminal that is similarly in an external network, resulting in
mounting communications cost. In the embodiment of FIG. 15, in
contrast, a phonebook page on the http server is browsed that is
provided as the capability of the dynamic phonebook display unit
230 of the call transfer server 10 by using the Web browsing
capability of the mobile phone 36-1 and specifying a specific
URL.
[0074] FIG. 17 shows an example of a phonebook page 260, provided
by the dynamic phonebook display unit 230, that shows a list of
staffers as communication parties, with each staffer name serving
as a clickable link. For this reason, when a staffer name in the
phonebook page is clicked as a called party, the call transfer unit
38 creates call origination event information as with the
embodiment of FIG. 1, resulting in the mobile phone 36-2, for
example, being selected on the communications terminal in the call
origination destination. When the mobile phone 36-2 is selected,
corresponding call transfer event information is created and given
to the call transfer unit 38, converting the SIP address in the
call transfer event to a phone number to which a call can be
originated from the mobile phone 36-1. Then, a confirmation screen
shown in FIG. 18 is created that includes the phone number of the
mobile phone 36-2 as a link, transferring the screen to the mobile
phone 36-1 as the call originator and establishing a link. For this
reason, the user of the mobile phone 36-1 clicks the "Yes" link in
a confirmation screen 262 of FIG. 18, thus originating a call to
the mobile phone 36-2 set up by the link and directly establishing
a communications path 231. As a result, there is only one
communications path in the mobile phone terminal 34; the path from
the mobile phone 36-1 to the mobile phone 36-2, resulting in
formation of two communications paths as shown in FIG. 16 and
thereby avoiding double charging.
[0075] FIGS. 19A to 19C are block diagrams showing the functional
configuration of the call transfer server 10 equipped with the
capability of avoiding double charging, together with the secure
gateway 30, the inhouse user client 14 and the outside user client
32. In FIGS. 19A to 19C, the dynamic phonebook display unit 230
newly provided in the call transfer server 10 is provided with a
phonebook display unit 232, a call origination event generation
unit 234, a PSTN phone number conversion unit 236 and a terminal
call origination link display unit 238. The configuration other
than the above is basically the same as that in the embodiment of
FIGS. 2A to 2C.
[0076] FIG. 20 is an explanatory view of a call terminal selection
sequence of the present invention for avoiding double charging. In
FIG. 20, when the mobile phone 36-1 makes a request for phonebook
page browsing 240 to the dynamic phonebook display unit 230 as a
call originator transfer, the dynamic phonebook display unit 230
performs a phonebook page return 242 as shown in FIG. 17. In
response, the mobile phone 36-1 receives the user ID through a
called party selection 244 from among the approved staffer list on
the phonebook page, creating a call origination event 246 including
SIP address and notifying the event to the communications terminal
selection unit 40. The communications terminal selection unit 40
makes an information inquiry 248 to the presence management unit 42
for acquisition of a terminal information list 250, selecting the
mobile phone 36-2 as communications terminal based on the
transmitted terminal selection and event information specified by
the user of the mobile phone 36-2 as described earlier and
establishing a call transfer event 252 in the dynamic phonebook
display unit 230. In response, the dynamic phonebook display unit
230 converts the SIP address to a PSTN phone number first, and then
creates a confirmation screen as shown in FIG. 18 and makes a call
termination terminal notification 256 to the mobile phone 36-1 as
the call origination terminal, thus establishing a communications
circuit from the mobile phone 36-1 to the mobile phone 36-2 through
a call origination 258 resulting from clicking of "Yes" on the
confirmation screen.
[0077] FIG. 21 is an explanatory view of a communications system of
the present invention for saving outside call numbers in the
internal network such as corporate network. In FIG. 21, the call
transfer server 10, provided in the internal network 12, is
provided with the call transfer unit 38, the communications
terminal selection unit 40, the presence management unit 42 and the
position information management unit 44, and further newly provided
with the dynamic phonebook display unit 230. In response to a call
transfer request to the dynamic phonebook display unit 230 by page
referencing provided from the mobile phone 36 of the mobile phone
network 34 as an http server, an external network, the dynamic
phonebook display unit 230 notifies, if it selects the extension
phone 16-1 in the internal network 12 as a transfer destination, a
key number 266 to the mobile phone 36 that has made a call transfer
request, thus allowing the mobile phone 36 to issue a call
origination request via the mobile phone network 34. When the call
transfer unit 38 of the call transfer server 10 receives the key
number 266 received as a result of the call origination request
from the mobile phone network 34, the dynamic phonebook display
unit 230 converts the number to an extension number and transfer
the call to the extension phone 16-1.
[0078] FIG. 22 is an extension number in the call transfer server
10-1 not equipped with the dynamic phonebook display unit 230 of
FIG. 21. In this case, the SIP-PSTN gateway server 35, a relay
point of the internal network 12 to the mobile phone network 34,
receives call connections to a plurality of phone numbers 268-1 to
268-4, and the call transfer server 10 transfers calls by selecting
the extension phone 16-1 from call terminator presence information,
as a result of which it is necessary to hold and manage a large
number of phone numbers for the internal network. In contrast, the
embodiment in FIG. 21 allows call transfer from the mobile phone 36
of the mobile phone network 34 to an internal call terminator as a
communications terminal using the key number 266, thus reducing
phone numbers--numbers required for call from external networks to
the internal network 12--down to one number, namely, the key number
266.
[0079] FIGS. 23A to 23C are block diagrams of the functional
configurations of the call transfer server 10, the secure gateway
30, the outside client 32 and the inhouse user client 14 in the
embodiment for saving outside call numbers shown in FIG. 21. In
FIGS. 23A to 23C, the call transfer server 10 is newly provided
with the dynamic phonebook display unit 230. The dynamic phonebook
display unit 230 is provided with the phonebook display unit 232,
the call origination event generation unit 234 and the terminal
call origination link display unit 238 whose capabilities are the
same as those for avoiding double charging shown in FIGS. 19A to
19C. The dynamic phonebook display unit 230 in the embodiment of
FIGS. 23A to 23C is further provided with a call origination
number/call termination extension number transfer registration unit
270. As a result of provision of the dynamic phonebook display unit
230, the call transfer unit 38 is newly provided with a transfer
destination registration unit 272 and a call-origination-number--
specific call transfer unit 274 in addition to the call origination
reception unit 46.
[0080] FIG. 24 is an explanatory view of a communications terminal
selection sequence of the present invention for saving outside call
numbers shown in FIGS. 23A to 23C. In FIG. 24, phonebook page
browsing 276 is performed on the dynamic phonebook display unit 230
functioning as an http server from the mobile phone 36 as the call
originator terminal using the Web browsing capability of the mobile
phone 36 and a specific URL, as with the embodiment of FIG. 11A and
FIG. 11B. In response to a request for the phonebook page browsing
276, the dynamic phonebook display unit 230 creates a same browsing
page 260 as that shown in FIG. 17, performing a phonebook page
return 278 to the mobile phone 36. The phone book page 260 in FIG.
17 displays a list of staffers' names as call originators, with
each staffer name serving as a clickable link. The user of the
mobile phone 36 transmits the user ID to the dynamic phonebook
display unit 230 through a called party selection 280 from among
called parties in the browsing page 260 as shown in FIG. 17. The
dynamic phonebook display unit 230 creates a call origination event
282 from the user ID received through the called party selection
280, notifying the event to the communications terminal selection
unit 40. The communications terminal selection unit 40 receives a
terminal information list 286 by making an information inquiry to
the presence management unit 42 and specifies, for example, the
extension number 16-1 as communications terminal to accompany with
user presence information as call terminator, thus returning a call
transfer event 288 to the dynamic phonebook display unit 230. The
dynamic phonebook display unit 230 performs a call origination
number/extension number transfer registration 290, made up of the
call origination number of the mobile phone 36, a call originator's
terminal, and the extension number of the selected extension number
16-1, in the call transfer unit 38. The dynamic phonebook display
unit 230 also performs a call termination terminal notification 292
having a key number to the mobile phone 36. More specifically, the
dynamic phonebook display unit 230 sends the confirmation screen
262, and if the user of the mobile phone 36 clicks the "Yes" link,
a call termination 294 for the key number is carried out to the
call transfer unit 38. In response to the call termination 294
using the key number, the call transfer unit 38 converts the call
origination number to the extension number based on the already
registered call origination number/extension number transfer
registration 290, transferring the call to the extension phone 16-1
and thereby establishing a call path with the mobile phone 36.
[0081] FIGS. 25A and 25B are flowcharts of a call terminal
selection processing of the present invention including the double
charging avoidance processing in FIG. 15 and the outside call
number saving processing in FIG. 21. In FIG. 25A and FIG. 25B, if
the dynamic phonebook display unit 230 receives a call transfer
event from an external communications terminal such as mobile phone
through Web page referencing and selects a communications terminal
at Step S1, then the dynamic phonebook display unit 230 verifies at
Step S2 whether the selected communications terminal is an inhouse
extension, and, if so, proceeds to Step S3 where the unit converts
the call origination number to an extension number for
registration. In response to the transfer registration, the call
transfer unit 38 performs a transfer registration for converting
the call origination number to the extension number at Step S7.
Next at Step S4, the dynamic phonebook display unit 230 sets the
key number as notification number at Step S4 and creates a
confirmation screen to be displayed on the call originator terminal
at Step S6, notifying the call originator terminal 11. The call
originator terminal 11 receives the confirmation screen from the
dynamic phonebook display unit 230 of the call transfer server 10
at Step S101, and when the user clicks a party on the confirmation
screen after confirmation at Step S102, a call is transmitted to
the notification number. Next at Step S103, the call originator
terminal 11 verifies whether the notification number is an inhouse
key number, and, since it is in this case, it transmits a call to
the inhouse key number at Step S105. In response to the call
origination to the inhouse key number from the call originator
terminal 11, the call transfer unit 38 of the call transfer server
10 transfers the call to the registered extension number based on
the transfer registration at Step S8. A description of the
processing for avoiding double charging will be given next with
reference to the flowchart in FIG. 25A and FIG. 25B. If the dynamic
phonebook display unit 230 receives a call transfer event through
Web page browsing by a mobile phone and if, at Step S2, the
selected call terminal is found to be an outside terminal, the
dynamic phonebook display unit 230 proceeds to Step S5 where the
unit converts the number in the call transfer event to the
converted PSTN phone number for use as notification number. At Step
S6, the dynamic phonebook display unit 230 creates a confirmation
number to be displayed that is linked to the call originator
terminal, transmitting the number to the call originator terminal
11. The call originator terminal 11 receives the confirmation
screen at Step S101, and if the "Yes" link is clicked in FIG. 18
after confirmation at Step S102, a call is transmitted to the
notification number. Next at Step S103, since the notification
number is not the inhouse key number, the call originator terminal
11 proceeds to Step S104 where the terminal 11 transmits a call to
the notification number, thus starting call. That is, it is
possible to avoid double charging as a result of call transfer via
the call transfer server 10 by establishing a direct call
connection to the notified notification number from the call
originator terminal 11. It is to be noted that while the
aforementioned embodiments take as examples the terminal selection
processing in call terminals such as fixed phone, mobile phone and
VoIP phone, the present invention is not limited thereto and may be
applied as is to a terminal selection processing in
transmission/reception of instant message, http and mail between
data communications terminals. The present invention, designed to
provide programs for performing a communications terminal selection
processing in a call transfer server, allows for implementation of
the programs as the steps of the flowcharts shown in FIG. 11A, FIG.
11B, FIG. 25A and FIG. 25B. The call transfer server 10 for
executing the programs is implemented by computer hardware
resources. Therefore, the computer is installed with programs for
performing the communications terminal selection processing of the
present invention in the hard disk drive, and loads necessary
programs from the hard disk drive during bootup into RAM for
execution by the CPU. Moreover, the path from the CPU is provided
with a telephone network required for extension phone network and
LAN network, allowing call and data communication with external
communications terminal via the Internet or wireless LAN. Further,
the present invention, designed to provide a storage medium storing
programs for performing the terminal selection processing in a call
transfer server, includes, as the storage medium, not only CD-ROM,
memory card and DVD but also hard disk provided for a computer
system, server database existing on a network, and further
transmission medium for communications circuit for the Internet and
so on. The present invention can include any appropriate
modifications without impairing the objectives and advantages
thereof and is not subject to any limitations by the numerical
values indicated in the above embodiments.
* * * * *